IMMOBILIZER CONTROL SYSTEM (G10/M13 ENGINES) 8G-3
On-board Diagnostic System for M13 Engine
Model
ECM and immobilizer control module diagnose troubles which
may occur in the area including the following parts when the igni-
tion switch is turned to ON position.
Immobilizer control module
• Immobilizer control module
• W-line (Communication line between ECM and immobilizer
control module)
• Password
• MIL circuit
• Transponder (ignition key)
• Fix code
ECM
• ECM
• Secret key
• Password
When a trouble exists in the immobilizer control system (when
immobilizer control module or ECM detects a diagnostic trouble
code (DTC)), ECM stops operation of the injector and igniter.
With the ignition switch turned ON (but the engine at stop) regard-
less of the condition of the engine and emission control system,
ECM indicates whether a trouble has occurred in the immobilizer
control system or not by flashing or turning ON the immobilizer
indicator lamp (1).
Immobilizer indicator lamp ON:
No trouble exists in the immobilizer control system.
Immobilizer indicator lamp flashing ON and OFF:
ECM or immobilizer control module has detected some trouble in
the immobilizer control system.
NOTE:
As soon as the ignition switch is turned to ON position,
ECM and immobilizer control module diagnose if a trou-
ble has occurred in the immobilizer control system in
about 5 seconds at maximum.
While the diagnosis is being made, the MIL (malfunction
indicator lamp) stays on and diagnosis result is abnor-
mal, it immediately changes to flashing but if the result is
normal, it remains on.
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